Anthony Berkeley Cox (5 July 1893 – 9 March 1971) was an English crime writer. He wrote under several pen-names, including Francis Iles, Anthony Berkeley and A. Monmouth Platts. Cox was one of the founders of the Detection Club.
In 1938, he took up book reviewing for John O'London's Weekly and the Daily Telegraph, writing under his pen name Francis Iles. He also wrote for the Sunday Times in the 1940s and for the Manchester Guardian, later The Guardian, from the mid-1950s until 1970. He reviewed several of the novels written by Agatha Christie.